Baffle for opposed engine cooling radiator cores



May 16, 1961 F. M. YOUNG 2,984,456

BAFFLE FOR OPPOSED ENGINE COOLING RADIATOR CORES Filed March 12, 1959 FRED M You/v6 plates is greatly accentuated.

United States Patent BAFFLE FOR OPPOSED ENGINE COOLING RADIATOR CORES Fred M. Young, Racine, Wis., assignor to Young Radiator Company, Racine, Wis., a corporation of Wisconsin Filed Mar. 12, 1959, Ser. No. 798,957

3 Claims. (Cl. 257-154) This invention relates to extra large-size, multiple-section radiators for use as jacket water coolers for heatgenerating engines.

From years of practical experience, manufacturers of heat exchange equipment have found it imperative to standardize their production within a range of variable sizes capable of meeting most of the demands for use with engines of varying horsepower.

Of recent years there has been an increasing step-up in the horsepower of heat-generating engines, especially of the diesel type. This has demanded water cooling equipment of increased capacity. Generally increased capacity has to be attained by structures of greater dimensions. Manufacturers have found it most practical to provide,these larger structures by assembling a plurality of their larger, standard-size core units end to end and/ or side by side, and provide for a continuous water flow through such as assembly.

One of the problems, confronted in the use of jacket water coolers, is the leakage through the engine-head gaskets into the water chambers. The resulting entrained products of combustion tend to acidulate the water. The acidulated water flowing around the tube ends in time tends to erode the solder bond of the tubes to the header plates.

When two core units are arranged end to end, this problem of eroding the solder bond of tubes to header In such an assembly the water flow is from the tube ends of one core unit, through the space between the headers, to the tube ends of opposed core unit. As the jets of water emerge from the ends of the tubes of the one core unit they tend to flare out and, inevitably, impinge with considerable force against the opposed tube ends and the contiguous portions of the header plate. Experience has shown that in cases where there is a considerable leakage of the products of combustion into the water system there has been an excessive eroding of the solder bond of the tubes of the opposed header plate. Moreover, in some instances, there has been considerable eroding of the header plate itself adjacent to the tube ends.

When such conditions develop to the point of producing leaky unit replacement of the entire unit is the only practical alternative. If the defective unit is not too badly damaged there is the expense of removing the defective header plate and replacing it with another.

The main objects of this invention, therefore, are to provide an improved bafile arrangement for opposed core units of multiple-unit jacket water coolers; to provide an improved bafile arrangement of this kind structured to direct the water jets from the tube ends of the one core unit to the tube ends of the opposed core unit; to provide an improved bafile arrangement for equipment of this kind which eliminates practically all possibility of erosion of the solder-bonded tubes and header plate; to provide an improved baffle arrangement of this kind for use with opposed core units where the tubes of the opposed units are axially offset as well as where they 2,984,456 Patented May 16, 1961 'ice 2 are axially aligned; and to provide an improved baflle arrangement of this kind which is of such simple construction as to make its manufacture very economical and servicing of the finished assembly extremely facile.

In the adaptation shown in the accompanying drawings:

Fig. 1 is a perspective view of one end of a jacket water cooler composed of a pair of core units assembled end to end;

Fig. 2 is an enlarged, fragmentary, vertical-sectional view of two opposed core units between which is interposed an improved bafile constructed and arranged in accordance with this invention;

Fig. 3 is an exploded, fragmentary view of opposed core units and interposed baffle arrangement where the tubes in the opposed core units are in axial alignment; and

Fig. 4 is a similar exploded, fragmentary view for an assembly where the tubes are not in axial alignment.

The essential concept of this invention involves a baffle plate dimensioned for interposition between directly-opposed core units of a multiple-section jacket water cooler formed with perforations, preferably with marginal plate portions upset to form nozzle-like projections to direct jets of water from the tube ends of one core unit to the tube ends of the other core so as to preclude impingement of the jets against the solder bond of the opposed tubes and supporting header plate.

A multiple-section engine jacket water cooler embodying the foregoing concept comprises a pair of core units 5 and 6 and perforate baffle 7 interposed between the superimposed headers 8 and 9 of the respective core units 5 and 6 with the baffie perforations so related to the opposed core tubes as to direct the water jets from the ends of the tubes of the one core unit to the tube ends of the other core unit and preclude the impingement of water jets against the solder bond of the tubes and against the headers per se.

The core units 5 and 6 are conventional structures comprising a battery of spaced, longitudinally-parallel tubes 11 bonded at the ends to the respective headers 8 and 9 of the two opposed units. Pins 12 of conventional form and material are arranged along the tubes 11 in the usual manner.

The tubes 11 here are shown of elongated cross section and the headers 8 and 9 are shown to be stampings with the main portions within the perimeters upset to constitute dish-like sections 13 offset from the plane of the perimetrical flanges 14. In the structure of this kind the tubes 11 extend a short distance inwardly from the base of the dish-like section 13 and are bonded thereto by solder rings 16.

The header flanges14 have a series of bolt holes 17, arranged adjacently inward around the flange perimeters, to provide for the bolted attachment of tanks (not here shown) and to secure the two core units 5 and 6 in their opposed relationship as shown in Fig. 1.

Reinforcing and protective plates 18 span each pair of headers for each core unit along the opposite narrower sides and are suitably bonded at their end to the respective headers.

The baflie 7 is made from a plate of a width and length substantially equal to the comparable dimensions of the headers 8 and 9. Perforations or ports 19 are formed in the balfle 7 of a shape and dimension approximately comparable to the shape and internal dimension of the tubes 11. Preferably portions of the baffie 7 bordering the perforations 19 are struck out from the one face of the baffle to form nozzle-like projections 21. Where the two core units 5 and 6 are opposed with the tubes 11 in axial alignment these nozzle-like projections 21 are disposed normal to the face of the baffle 7, as shown in Fig. 3. For assemblies where the tubes 11 of the two absence core units and 6 are not in axial alignment, these nozzle projections 21 are disposed at an angle to the face of the baffle, as shown in Fig. 4. t p The two core units 5 and 6 here are shown arranged in end-to-end relationship with the flanges 14 superim: posed on the interposed baffle 7 and removably secured in such relationship by bolts 22. "'In the operation of a water jacket cooler of this kind, the jets of water issuing from the tubes 11 of the upper unit 5 are directed into the registering baflle perforations or ports 19 before the water jets have a chance to flare out from the tube ends, as normally would be the case but for the interposition of the baffle 7 between the two core units 5 and 6. Passing through the nozzle-like projections 19 these jets of water are almost immediately directed into the ends of the tubes 11 of the lower core unit 6. l 'The use of such a perforate and nozzled baffle 7, between two opposed core units of this type, obviates the serious problem that heretofore has obtained in engine jacket water coolers comprising an assembly of opposed core units 5 and 6 without such an interposed baffle 7. In those former structures the jets of water issuing from the tubes of the upper core unit tended to flare outwardly as they issued toward the tubes of the lower core unit. The water, more than likely having become acidulated by the leaking gases from the engine cylinders, these jets of prior assemblies, have impinged against the solder rings 16 of the tubes of the lower core unit. This has tended to erode such solder to the point of creating leaks. In some instances these water jets from the tubes of the upper core unit of the non-baffle assemblies, impinging on the header of the lower core unit around the tube ends, have also tended to erode the plate to the point of requiring repair.

When the lower core unit of such a baflleless assembly has had the sholder rings for one or more tubes eroded to the point of effecting a leak, it has become necessary to disassemble the two units and replace the lower one with a new core unit. Problems of this kind, with baffleless assemblies, are completely eliminated in an assembly with the hereinshown interposed baflle 7.

Variations and modifications in the details of structure and arrangement of the parts may be resorted to within the spirit and coverage of the appended claims.

I claim:

1. A jacket water cooler comprising, two separatelystructured core units each of which has a plurality of tubes bonded at their ends to header plates, the two units being positioned in end-to-end relationship with the header plates superimposed on an interposed perfo= rate bailie having a plurality of nozzle-like projections comparable to the plurality of tubes registering with the perforations and protruding from one face of the baffle so as to direct water jets from the tube ends of one unit to the tube ends of the other unit, and means for securing the header plates and' interposed baflle in assembled relationship. i

2. A jacket water cooler comprising, two separatelystructured core units each of which has a plurality of tubes bonded at their ends in a dish-like header plate with a perimetrical flange, the tube ends being disposed inwardly of the respective perimetrical flanges, the two units being positioned in end-to-end relationship with the perimetrical flanges superimposed on an interposed perforate baflle having a plurality of nozzle-like projections comparable to the plurality of tubes upset from one face of thebafile in registration with the respective perforations so as to direct water jets from the tube ends of one unit to the tube ends of the other unit, and means for securing the flanges and bathe in assembled relationship.

3. A jacket water cooler comprising, .two separatelystructured core units each of which has a plurality of tubes bonded at their ends to header plates each having a rectangular-shaped depression offset from an outwardlyextending bordering flange parallel with the tubesupporting portion of the depression apertured to receive the bonded tube ends disposed in a plane intermediate the inner face of the depression and the face of the flange, the two units being positioned in end-to-end relationship with the header-plate flanges superimposed on an interposed perforate baffle, a plurality of nozzle-like projections comparable in number to the tubes registering with the perforations and protruding from one face of the baflle so as to direct water jets fromthe tube ends of one unit to the tube ends of the other unit, and means for securing the header plates and interposed battle in assembled relationship.

References Cited in the file of this patent UNITED STATES PATENTS 7 600,159 Mixer Mar. 8, 1898 1,067,861 Breaker July 22, 1913 1,539,212 Seemiller May 26, 1925 1,597,720 Carrier Aug. 31, 1926 1,743,989 Wainwright Jan. 14, 1930 2,204,447 Samans June 11, 1940 FOREIGN PATENTS 249,534 Great Britain Aug. 12, 1926 

